Russia Could Face More Penalties If It Tries to Annex Any Other Former Soviet Union Countries

BERLIN—Germany's Foreign Minister Frank-Walter Steinmeier has warned Russia that it will face further sanctions if the Kremlin tries to annex eastern Ukraine or other countries that were part of the former Soviet Union.

"We're not at that point [of annexations of further regions] and I hope that it won't come to that, but one thing is clear: should Russia reach beyond Crimea, we in Europe will pass decisive measures—even if we...